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Predicting the energy consumption of heated plastic greenhouses in south-eastern Spain

J. C. López,A. Baille,S. Bonachela,M. M. González-Real,J. Pérez-Parra

Published 2006 in Spanish Journal of Agricultural Research

ABSTRACT

Measurements of heat consumption in a parral type greenhouse, equipped with an air-heating system, were carried out in south-eastern Spain (Almeria) during the 1998/99 winter. From the daily values of heat consumption (Qd, MJ m -2 d -1 ) recorded in five identical greenhouses heated to different night temperature set-points (Tc), and data of minimum outside air temperature (Te,min), relationships between Qd and the temperature difference (∆Tmin = Tc ‐ Te,min) were established. Linear regressions between Qd and ∆Tmin gave satisfactory fits (R 2 ranging from 0.75 to 0.83), considering that Te,min was the only input data for the model. When all data were pooled, the correlation was curvilinear, the best fit to a 2 nd order polynomial being Qd = 0.049 ∆Tmin 2 ‐ 0.001 ∆Tmin + 1.107 (R 2 = 0.89). Validation of this model was performed using data obtained during other years, giving a fair agreement at the daily (R 2 = 0.86), 10-day (R 2 = 0.95) and yearly (R 2 = 0.99) time scales. This simple model could be of interest to growers for decision-making related to

PUBLICATION RECORD

  • Publication year

    2006

  • Venue

    Spanish Journal of Agricultural Research

  • Publication date

    2006-12-01

  • Fields of study

    Agricultural and Food Sciences, Mathematics, Environmental Science

  • Identifiers
    DOI 10.5424/SJAR/2006044-206
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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